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v 2 Sheets-Sheet 1. T. A MACAULAY.

sBWmG MACHINE. No. 248,593.l Patented 0011. 25,1881.

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T. A MACAULAY.

SEWING MACHINE.

No. 248,598. Patented Oct. 25,1881.

Attorneys N. Primi mwmumngmpw. whmmm n. a.

iinrrnn Sterns THOMAS A. MAGAULAY, OF NEW YORK, N. Y.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 248,593, dated October25, 1881.

Application tiled November 11, 1879.

To all whom it may concern:

Be it known that I, THOMAS A. MAGAULAY, of the city, county, and Stateof New York, have invented new and useful Improvements inSewing-Machines, of which the following, with the accompanying drawings,is a specilication which will enable others skilled in thc art ofniaking sewing-machines to make and use the same.

Similar letters refer to like parts.

The object of my invention is to simplify the construction ofsewing-machines; and it consists of the devices and their arrangement,as hereinafter more fully described, the features thereof being, first,the combination, with the arm provided with a side opening and anenlarged inclosed bearing, of a crank-shaft adapted to be inserted insaid arm; second, ameans of coupling the pitinan to the crank whichconveys motion from the crank to other parts of the machine locatedunder the platform; third, a device for converting' and conveying therotary motion ofthe main drivingfshaft in the arm of the sewing-machineto operate other devices located under the platform requiring rotarymotion; fourth, a compensating-journal stud for taking up lost motion;tit'th, a means ot' operating a shuttle when held in a carrier.

In the drawings, Figure 1 is a sectional side elevation ot'asewing-machine embodying my invention. Fig. 2 is aplan view of the underside of the bed. Fig. 3 is a sectional elevation ofthecompensating-journal. Fig. 4 is a face view of the slotted crank G.Figs. 5 and 6 are detail views of the arm and crank-shaft. Fig. 7 is across-section of Fig. l through the post A. Fig. 8 is a plan view of thesh Little-carrier. Fig. 9 is a sectional view of the shuttle.

Ais the arm. A is the post of arm. B is the bed. O is the maindriving-shaft. C is the crank. O2 is a disk or crank. O3 is an enlargedjournal. D is a pitnian. D is a hinged cap. D2 is a hinged pin. D3 is anextension of the pit-man D. D4 is a stud-pin. E is a bell-crank lever.Fis a connecting-lever. F is a projection for bearin g. F2 is aball-joint or bearing. G is a slotted crank. H is a shuttle-lever. H isa hub on the said lever. Iis a coneheaded bolt. l2 is a coned lock-nut.J is a shuttle-carrier. J2 is a shuttle. K is a'feed-bar. K2 is aspring. o c2 are openings in the arm. c3 is a clamping-screw on thepitman. d is a wing or heel-piece on the shuttle. e is a driving horneis a shuttle-guard.

The arm A is hollow, and provided with an enlarged bearing orseata-t itsfront end or head A2, and two openings, o 02,011 its rear side.

The shaft O, crank O', and disk O2 are made in one piece. The frontbearing', O3, is oflarger diameter than the shaft and is made short. Theopening C2 extends from the edge of the front bearing backward. Toinsert the shaft its rear end is passed in through the front bearing inthe head A slantwise and upward, (see Fig. 5,) so as to pass out of theopening c2. The crank O is now in the t'ront bearing. By turning theshaft round, bringing its rear end into the hollow of the arm andpressing it toward the rear bearing, the crank Owill have passed throughthe front bearing in the head A. The shaft can now be passed backward tothe rear bearing, in which it tits, the front bearing, O3,

vtitting snugly in the enlarged bearing in the head A'. A modificationof' this way of inserting the crank-shaft is shown in Fig. 6, where thecrank-shaft and disk and hub or bush are two or more separate pieces,the front end of the shaft being passed through theopening c2 slantwisefrom the outside and out through the front bearing, which is larger thanthe diameter of the shaft. The-disk (Pis pinned to the shaft whileinthis position. The shaft is then passed back to its rear seat, as inFig. 5,-

and is in place. The bush C3 is then secured in the enlarged bearing ofthe arm by a setscrew, c, as indicated in said figure. The bush O3 maybe made integral with the disk O2, if desired. The screw c would then beunnecessary. i

rlhe pitman is attached to the crank G by the hinged cap D, which ispinned to the pitman D by the hin ge-pin D2 and clam pin g-screw o3. Anopening, c', in the rear side of the arm gives access to the cap, screw,and crank.

IThe rotary motion of the main driving-shaft is transmitted to a crankunder the platform, to which is connected a Icam for operating the feed.

The pitrnan-lever D D3 being centrally connected at D, the motion of thecrank C causes its lower end to travel round a given center.

The connecting-lever E being connected to IOO the pitman-lever at h andfulcrumed at F', its

front end travels round the center of crank G, revolving the crank andits cam. A revolving hook or revolving shuttle-carrier may be operatedin the same way.

The compensating-journal consists of the cone-headed bolt I, theadjustable cone locknut Iz, and the screw-threaded hole in the bed B,the bolt and lock-nut being in the position shown in Fig. 3, tightenough to permit an easy motion ot the shuttle-lever H between thecones. By turning thelock-nut until it is tight against the bed the boltwill then be firmly locked in the bed, and the lever will move freely onthe bolt. The bolt may be a taper one instead of cone-headed, and thelock-nut without a cone and secured in the same way, and serve thepurpose ot' a compensatingjournal as well as the cones.

The shuttle is carried in a cradle in the usual manner, but is carriedforward and back by the rear horn, c, of the carrier engaging with therear end of the shuttle and a wing, d, lixed to the rear end of theshuttle. The front horn, e', of the carrier acts as a guard to keep theshuttle from falling out. The bobbin J', being hollow, is held in theshuttle on an arbor, f2, passing through it, resting in a cavity in thefront end of the shuttle. The shuttle is cylindrical and split in thedirection ot' its length, and the head of the: arbor, being of slightlygreater diameter than theinternal diameter of the shuttle, when pressedinto the shuttle is held suiciently tight to draw the shuttle backwardas the rear horn of the carrier engages with it. When the shuttlel is ofthe kind in which the bobbin is inserted from the side, the Wing d maybe part of the body ofthe shuttle and be operated by the carrier, asabove described.

rlhe arm A, having the openings c c2 for admitting the shaft andconnecting the crank and pitman, as described, is weakened thereby tosome extent. To prevent this weakening as much as possible a sunk rib orweb, X, is provided inside ot' the depression left for the receptiou ofthe cover which closes the openings c c2. This rib or web, having athreaded hole,

serves also as a means whereby to attach the cover as well as tostrengthen the arm.

A shuttle having acurved face and drivingwing and a shuttle having aswinging bar provided with a drivingwing will not be claimed in thisapplication, but will be made the subject-matter of a separateapplication.

Having described my invention and the manner of carrying it intoetfeet,what I claim is- 1. The combination of a sewing-machine arm, A,having a side opening and an enlarged inclosed bearing, with thecrank-shaft C, substantially as and for the purposes herein described.

2. The shaft C, having a crank, C', and an enlarged journal, C3, incombination with the sewing-machine arm A, provided with an enlargedinclosed bearing and side opening, substantially as and for the purposesherein described.

3. In combination vfith the crank C and pitman D, provided with thehinged cup D', the hollow arm A, having an aperture, c, opposite thesaid cap and crank, for the purpose set forth.

4. The combination ot` the crank C', pit|nanlever D D3, with the leverF, crank G, and sleeve or shaft G, substantially as set forth.

5. The compensating-journal composed of the bolt I and single lock-nut12, located boneath the bedplate, in combination with the hub H andbed-platc B, substantially as herein specified.

6. The combination of the carrier J, having the rear driving-horn, c,with a shuttle having a wing, d, substantially as set forth.

THOS. A. MACAULAY.

Witnesses:

I. L. HEWLETT, PHILIP BECKER.

